Portable aquarium filter



FIG. 1 is a front, right perspective view of a portable aquarium filler showing my new design;

FIG. 2 is a rear, left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is an enlarged top view thereof;

FIG. 8 is an enlarged bottom view thereof; and,

FIG. 9 is an enlarged detail view of area 9 circumscribed within FIG. 7.

The broken lines and unshaded areas within openings in the article depict portions of the portable aquarium filter that form no part of the claimed design. The broken lines surrounding the detail area within FIG. 7 and around FIG. 9 are the boundaries of the detail areas and form no part of the claimed design. 

CLAIM The ornamental design for a portable aquarium filter, as shown and described. 